Question
There were 421 purple, pink and yellow balls in a bag. Given that there were 131 more purple balls than yellow balls and 62 more pink balls than yellow balls, how many yellow balls were there in the bag?
4 m

Click button first when a symbol is required. X

There were 421 purple, pink and yellow balls in a bag. Given that there were 131 more purple balls than yellow balls and 62 more pink balls than yellow balls, how many yellow balls were there in the bag?